LONG-TERM DEBT AND OTHER FINANCING ARRANGEMENTS Convertiable Notes Tables (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Mar. 31, 2013 2015 Convertible Notes [Member]	Dec. 31, 2011 2015 Convertible Notes [Member]
Debt Instrument Rollforward [Roll Forward]
Principal Amount of Liability Component, Beginning Balance			$ 261,034	$ 261,000
Principal Amount of Liability Component, Ending Balance			261,034	261,000
Unamortized Discount, Beginning Balance			(29,222)
Amortization of debt issuance discount	(1,836)	(3,558)	2,260
Unamortized Discount, Ending Balance			(26,962)
Net Carrying Amount, Beginning Balance	1,213,423		231,812
Net Carrying Amount, Beginning Balance	1,166,143		234,072
Equity Component, Beginning Balance			11,907
Equity Component, Ending Balance			$ 11,907